66488575 has 12 divisors (see below), whose sum is σ = 83845080. Its totient is φ = 52288160.

The previous prime is 66488573. The next prime is 66488627. The reversal of 66488575 is 57588466.

It is not a de Polignac number, because 66488575 - 2¹ = 66488573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66488573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21064 + ... + 24013.

It is an arithmetic number, because the mean of its divisors is an integer number (6987090).

Almost surely, 2^66488575 is an apocalyptic number.

66488575 is a deficient number, since it is larger than the sum of its proper divisors (17356505).

66488575 is a wasteful number, since it uses less digits than its factorization.

66488575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45146 (or 45141 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 49.

The square root of 66488575 is about 8154.0526733643. The cubic root of 66488575 is about 405.1187478851.

The spelling of 66488575 in words is "sixty-six million, four hundred eighty-eight thousand, five hundred seventy-five".